Display device

ABSTRACT

A touch display device is provided. The touch display device includes a substrate and a plurality of display units disposed on the substrate, wherein the display units form a display region and the display region has a first outline. The touch display device further includes an insulating layer disposed on the display units and a plurality of touch units disposed on the insulating layer, wherein the touch units form a touch region, and the touch region has a second outline. The touch display device further includes a reflection reducing layer disposed on the touch units, the reflection reducing layer is in contacted with the touch units and has a third outline, wherein the first outline and the second outline are located within the third outline in a view of a first direction perpendicular to the substrate.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of application Ser. No. 15/670,129,filed on Aug. 7, 2017, which claims the benefit of U.S. ProvisionalApplication No. 62/441,579, filed Jan. 3, 2017.

BACKGROUND Technical Field

The disclosure relates to a touch display device, and in particular to atouch display device with a reflection reducing layer.

Description of the Related Art

As technology progresses, several information devices are beingdeveloped, such as mobile phones, tablet PCs, ultra-thin laptops, andsatellite navigation. Except for using a keyboard or mouse for keying inand control, a popular way to control information devices is throughtouch technology. The touch display device usually has a user-friendlyand intuitive user interface, so that users of all ages can operate orcontrol their information devices by using a finger or stylus.

However, since the metal material formed on the touch module or thedisplay module of the touch display device can reflect light, thedisplay quality of the touch display device can be adversely affected.Therefore, a touch display device with a reflection reducing layer whichmay further improve display quality is needed.

SUMMARY

The present disclosure provides a touch display device, including: asubstrate and a plurality of display units disposed on the substrate,wherein the display units form a display region and the display regionhas a first outline. The touch display device further includes aninsulating layer disposed on the display units and a plurality of touchunits disposed on the insulating layer, wherein the touch units form atouch region, and the touch region has a second outline. The touchdisplay device further includes a reflection reducing layer disposed onthe touch units, the reflection reducing layer is in contacted with thetouch units and has a third outline, wherein the first outline and thesecond outline are located within the third outline in a view of a firstdirection perpendicular to the substrate.

A detailed description is given in the following embodiments withreference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure may be more fully understood by reading the subsequentdetailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1 is a schematic top view of a touch display device in accordancewith some embodiments of the present disclosure;

FIG. 2 is a schematic cross-sectional view along line A-A′ in FIG. 1 inaccordance with some embodiments of the present disclosure;

FIG. 3 is a schematic cross sectional view showing a structure of areflection reducing layer in accordance with some embodiments of thepresent disclosure;

FIG. 4A is a schematic cross sectional view of a touch display device inaccordance with some embodiments of the present disclosure;

FIG. 4B is a schematic cross sectional view of a touch display device inaccordance with some embodiments of the present disclosure.

DETAILED DESCRIPTION

The touch display device of the present disclosure is described indetail in the following description. In the following detaileddescription, for purposes of explanation, numerous specific details andembodiments are set forth in order to provide a thorough understandingof the present disclosure. The specific elements and configurationsdescribed in the following detailed description are set forth in orderto clearly describe the present disclosure. It will be apparent,however, that the exemplary embodiments set forth herein are used merelyfor the purpose of illustration, and the inventive concept may beembodied in various forms without being limited to those exemplaryembodiments. In addition, the drawings of different embodiments may uselike and/or corresponding numerals to denote like and/or correspondingelements in order to clearly describe the present disclosure. However,the use of like and/or corresponding numerals in the drawings ofdifferent embodiments does not suggest any correlation between differentembodiments. In addition, in this specification, expressions such as“first material layer disposed on/over a second material layer”, mayindicate the direct contact of the first material layer and the secondmaterial layer, or it may indicate a non-contact state with one or moreintermediate layers between the first material layer and the secondmaterial layer. In the above situation, the first material layer may notbe in direct contact with the second material layer.

It should be noted that the elements or devices in the drawings of thepresent disclosure may be present in any form or configuration known tothose skilled in the art. In addition, the expression “a layer overlyinganother layer”, “a layer is disposed above another layer”, “a layer isdisposed on another layer” and “a layer is disposed on another layer”may indicate that the layer is directly in contact with the other layer,or that the layer is not directly in contact with the other layer, therebeing one or more intermediate layers disposed between the layer and theother layer.

In addition, in this specification, relative expressions are used. Forexample, “lower”, “bottom”, “higher” or “top” are used to describe theposition of one element relative to another. It should be appreciatedthat if a device is flipped upside down, an element that is “lower” willbecome an element that is “higher”.

The terms “about” and “substantially” typically mean +/−20% of thestated value, more typically +/−10% of the stated value, more typically+/−5% of the stated value, more typically +/−3% of the stated value,more typically +/−2% of the stated value, more typically +/−1% of thestated value and even more typically +/−0.5% of the stated value. Thestated value of the present disclosure is an approximate value. Whenthere is no specific description, the stated value includes the meaningof “about” or “substantially”.

It should be understood that, although the terms first, second, thirdetc. may be used herein to describe various elements, components,regions, layers, portions and/or sections, these elements, components,regions, layers, portions and/or sections should not be limited by theseterms. These terms are only used to distinguish one element, component,region, layer, portion or section from another region, layer or section.Thus, a first element, component, region, layer, portion or sectiondiscussed below could be termed a second element, component, region,layer, portion or section without departing from the teachings of thepresent disclosure.

Unless defined otherwise, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which this disclosure belongs. It should be appreciated that,in each case, the term, which is defined in a commonly used dictionary,should be interpreted as having a meaning that conforms to the relativeskills of the present disclosure and the background or the context ofthe present disclosure, and should not be interpreted in an idealized oroverly formal manner unless so defined.

This description of the exemplary embodiments is intended to be read inconnection with the accompanying drawings, which are to be consideredpart of the entire written description. The drawings are not drawn toscale. In addition, structures and devices are shown schematically inorder to simplify the drawing.

In the description, relative terms such as “lower,” “upper,”“horizontal,” “vertical,” “above,” “below,” “up,” “down,” “top” and“bottom” as well as derivative thereof (e.g., “horizontally,”“downwardly,” “upwardly,” etc.) should be construed to refer to theorientation as then described or as shown in the drawing underdiscussion. These relative terms are for convenience of description anddo not require that the apparatus be constructed or operated in aparticular orientation. Terms concerning attachments, coupling and thelike, such as “connected” and “interconnected,” refer to a relationshipwherein structures are secured or attached to one another eitherdirectly or indirectly through intervening structures, as well as bothmovable or rigid attachments or relationships, unless expresslydescribed otherwise.

The term “substrate” is meant to include devices formed within atransparent substrate and the layers overlying the transparentsubstrate. All transistor element needed may be already formed over thesubstrate. However, the substrate is represented with a flat surface inorder to simplify the drawing. The term “substrate surface” is meant toinclude the uppermost exposed layers on a transparent substrate, such asan insulating layer and/or metallurgy lines.

The embodiment of the present disclosure provides the touch displaydevice with the reflection reducing layer in contact with the touchunits, which in turn improves the display quality of the touch displaydevice.

FIG. 1 is a top view of a touch display device 1, and FIG. 2 is across-sectional view along line A-A′ in FIG. 1 in accordance with anembodiment of the present disclosure. As shown in FIGS. 1-2, the touchdisplay device 1 includes a substrate 10 having a main surface on whicha plurality of display units 121 are arranged. For the sake ofsimplicity and clarity, only three display units 121 are illustrated inFIGS. 1-2, and driving circuit (e.g., transistors, gate lines, datalines, or capacitance) for the plurality of display units 121 ispartially omitted. The material of the substrate 10 may include, but isnot limited to, quartz, glass, metal foil, polymethylmethacrylate(PMMA), polyimide (PI), polyethylene terephthalate (PET), polyethylenenaphthalate (PEN), and polybutylene naphthalate (PBN). As shown in FIG.1, the display units 121 form a display region 12 for displaying imagesand the display units 121 may include, but is not limited to, organiclight emitting diodes (OLED), micrometer size inorganic light emittingdiodes (micro-LED), liquid crystal sub-pixels (a sub-pixel is a unitwith a portion of electrodes and a portion of liquid crystal cell fordisplaying basic dot). The display region 12 is defined by the outerboundary of the set of display units 121, the outline of display region12 encloses all display units 121, and all display units 121 aredisposed within the display region 12. The shape of the display units121 could be rhombus, parallelogram, rectangle, square, triangle,circle, or other shapes suitable for displaying and layout arrangement.Furthermore, each of the display units 121 defines a plurality ofsub-pixels, such as red sub-pixel, blue sub-pixel and green subpixel,and for example, three sub-pixels can form a pixel. In otherembodiments, the display units 121 could be red sub-pixels, bluesub-pixels, green sub-pixels, and white sub-pixels, or the display units121 could be red sub-pixels, blue sub-pixels, green sub-pixels, andyellow sub-pixels. In addition, the touch display device 1 may furtherinclude a plurality of display signal lines 122 electrically connectedto the display units 121, such as gate lines and data lines. The touchdisplay device 1 may further include a plurality of circuit elementselectrically connected to the display units 121, such as transistor andcapacitance.

The touch display device 1 may further include an insulating layer 14disposed on the display units 121. The material of the insulating layer14 may include, but is not limited to, organic insulating materials(such as photosensitive resins) or inorganic insulating materials (suchas silicon nitride, silicon oxide, silicon oxynitride, silicon carbide,aluminum oxide, or a combination thereof).

The touch display device 1 may further include a plurality of touchunits 161 disposed on the insulating layer 14, and the touch units 161form a touch region 16 for sensing touch events. The touch region isdefined by the outer boundary of the set of the touch units 161, theoutline of touch region 16 encloses all touch units 161, and all touchunits 161 are disposed within the touch region 16. The shape of thetouch units 161 could be rhombus, parallelogram, rectangle, square,triangle, circle, or other shapes suitable for touch sensing and layoutarrangement. For the sake of simplicity and clarity, only some touchunits 161 are illustrated in FIG. 1. The material of the touch units 161may include, but is not limited to, transparent conductive materials(such as indium tin oxide (ITO), tin oxide (SnO), indium zinc oxide(IZO), indium gallium zinc oxide (IGZO), indium tin zinc oxide (ITZO),antimony tin oxide (ATO), antimony zinc oxide (AZO), or a combinationthereof) or metal (such as copper, aluminum, molybdenum, tungsten, gold,cobalt, nickel, platinum, titanium, iridium, rhodium, an alloy thereof,or a combination thereof). In addition, the touch display device 1 mayfurther include a plurality of touch signal lines 162 electricallyconnected to the touch units 161.

Furthermore, the touch display device 1 may include a reflectionreducing layer 18 on the touch units 161 and may in contact with thetouch units 161. The reflection reducing layer 18 may covers at least aportion of the touch units 161, at least a portion of the insulatinglayer 14, and at least a portion of the touch signal lines. Thereflection reducing layer 18 may in contact with the substrate.

Still referring to FIG. 1, a top view of a touch display device 1, whichis a view of a first direction D1 substantially perpendicular to thesubstrate 10. It should be noted that, the display region 12 has a firstoutline OL1 substantially enclosing and surrounding the display units121. The touch region 16 has a second outline OL2 substantiallyenclosing and surrounding the touch units 161. The reflection reducinglayer 18 has a third outline OL3 substantially corresponding to the edgeof the reflection reducing layer 18. In particular, the first outlineOL1 and the second outline OL2 are located within the third outline OL3.In addition, the insulating layer 14 has a fourth outline OL4substantially corresponding to the edge of the insulating layer 14. Thefourth outline OL4 is located within the third outline OL3.

Since the first outline OL1 and the second outline OL2 are locatedwithin the third outline OL3, namely the display units 121 and the touchunits 161 are also located within the reflection reducing layer 18 whenviewed along the first direction D1 (in top view). In this way, theanti-reflection is more effective, and the reflection reducing layer 18could cover whole touch units 161, so the reflection reducing layer 18also can protect the display units 121 and the touch units 161 fromcorrosion by the water vapor, whereby the display quality and thereliability of touch display device 1 could be improved.

Referring to FIG. 2, the insulating layer 14 corresponding to thedisplay region 12 has a first thickness t1 in the first direction D1.The reflection reducing layer 18 corresponding to the display region 12has a second thickness t2 in the first direction D1. In this embodiment,the first thickness t1 is greater than the second thickness t2. In someembodiments, but is not limited to, the first thickness t1 may rangefrom about 2 μm to 50 μm, and the second thickness t2 may range fromabout 0.05 μm to 2 μm.

As the touch units 161 are disposed on the insulating layer 14 andbetween the insulating layer 14 and the reflection reducing layer 18,the planarization of the insulating layer 14 is needed. Furthermore, thereflection reducing layer 18 is used for reduce reflection based on thedestructive interference, so that the first thickness t1 may be greaterthan the second thickness t2.

FIG. 3 is a schematic cross sectional view showing a structure of areflection reducing layer 18 in accordance with an embodiment of thepresent disclosure. The reflection reducing layer 18 may include a firstlayer 181 and a second layer 182. For example, in one embodiment, thefirst layer 181 is disposed on the touch units 161 by spin coating,physical vapor deposition (PVD), chemical vapor deposition (CVD), orother deposition method, and the first layer 181 is adjacent to thetouch units 161 and in contact with the touch units 161. The secondlayer 182 is disposed on the first layer 181. The first layer 181corresponding to the display region 12 has a third thickness t3 in thefirst direction D1 and the second layer 182 corresponding to the displayregion 12 has a fourth thickness t4 in the first direction D1. Inparticular, the third thickness t3 is different from the fourththickness. For example, the third thickness t3 is greater than thefourth thickness. In some embodiments, but is not limited to, the thirdthickness t3 is ranged from about 15 nm to 80 nm and the fourththickness t4 is ranged from about 5 nm to 15 nm. The material of thefirst layer 181 may include, but is not limited to, silicon oxide,silicon nitride, silicon oxynitride, niobium oxide, titanium oxide,zirconium oxide, any other suitable dielectric material, or acombination thereof. The material of the second layer 182 may include,but is not limited to, copper, aluminum, molybdenum, tungsten, gold,silver, cobalt, nickel, platinum, titanium, iridium, rhodium, niobium,chromium, an alloy thereof, any other suitable metal material, or acombination thereof.

Since the material of the second layer 182 may include metal material,the fourth thickness t4 may not be too thick (15 nm) or thetransmittance of the touch display device 1 will be adversely affected.

In addition, the reflection reducing layer 18 may include a third layer183 disposed on the second layer 182. In other words, the second layer182 is disposed between the first layer 181 and the third layer 183. Insome embodiments, but is not limited to, the thickness and the materialof the third layer may be similar to the first layer 181.

FIG. 4A is a schematic cross sectional view of a touch display device inaccordance with some embodiments of the present disclosure. It should benoted that the reflection reducing layer 18 may include a plurality ofrecesses R corresponding to the display units 121 in the first directionD1. The reflection reducing layer 18 may further include a plurality ofprotrusions P. The recesses R and the protrusions P are arranged inalternating positions. For example, there is one protrusion P betweeneach two recesses R, or one recess R between each two protrusions P. Inaddition, the reflection reducing layer 18 has a fifth thickness t21corresponding to one of the recesses R on one of the display units 121in the first direction D1, and the reflection reducing layer 18 has asixth thickness t22 corresponding to one of the protrusions P in thefirst direction D1. The fifth thickness t21 is less than the sixththickness t22.

FIG. 4B is a schematic cross sectional view of a touch display device inaccordance with some embodiments of the present disclosure. It should benoted that the reflection reducing layer 18 may include a plurality ofthrough holes H corresponding to the display units 121 in the firstdirection D1.

Since the reflection reducing layer 18 may include the recesses R or thethrough holes H corresponding to the display units 121, thetransmittance of the touch display device 1 could be improved.

In summary, the present disclosure provides the touch display device 1with the reflection reducing layer 18 in contact with the touch units161. In addition, the first outline OL1 of the display region 12 and thesecond outline OL2 of the touch region 16 are located within the thirdoutline of the reflection reducing layer 18, which in turn improves thedisplay quality of the touch display device.

Note that the above element sizes, element parameters, and elementshapes are not limitations of the present disclosure. Those skilled inthe art can adjust these settings or values according to differentrequirements. It is understood that the touch display device and methodfor manufacturing the same of the present disclosure are not limited tothe configurations of FIGS. 1 to 4B. The present disclosure may merelyinclude any one or more features of any one or more embodiments of FIGS.1 to 4B. In other words, not all of the features shown in the figuresshould be implemented in the touch display device and method formanufacturing the same of the present disclosure.

Although some embodiments of the present disclosure and their advantageshave been described in detail, it should be understood that variouschanges, substitutions and alterations can be made herein withoutdeparting from the spirit and scope of the disclosure as defined by theappended claims. For example, it will be readily understood by thoseskilled in the art that many of the features, functions, processes, andmaterials described herein may be varied while remaining within thescope of the present disclosure. Moreover, the scope of the presentapplication is not intended to be limited to the particular embodimentsof the process, machine, manufacture, composition of matter, means,methods and steps described in the specification. As one of ordinaryskill in the art will readily appreciate from the disclosure of thepresent disclosure, processes, machines, manufacture, compositions ofmatter, means, methods, or steps, presently existing or later to bedeveloped, that perform substantially the same function or achievesubstantially the same result as the corresponding embodiments describedherein may be utilized according to the present disclosure. Accordingly,the appended claims are intended to include within their scope suchprocesses, machines, manufacture, compositions of matter, means,methods, or steps.

What is claimed is:
 1. A display device, comprising: a substrate; aplurality of display units, disposed on the substrate and forming adisplay region; an insulating layer, disposed on the display units andcovering the plurality of display units; and a reflection reducinglayer, disposed on the plurality of display units; wherein theinsulating layer is in contact with a portion of the substrate, and thereflection reducing layer is in contact with at least a portion of thesubstrate.
 2. The display device of claim 1, wherein the substrate has asurface, the display units are disposed on the surface, and thereflecting reducing layer is in contact with the surface of thesubstrate.
 3. The display device of claim 1, wherein the substrate is atransistor substrate.
 4. The display device of claim 1, wherein theinsulating layer has a curved portion in a cross sectional view, and thecurved portion has a curved edge.
 5. The display device of claim 4,further comprising a plurality of touch units and a plurality of touchsignal lines electrically connected to the plurality of touch units,wherein the plurality of touch signal lines overlap with the curvedportion of the insulating layer in view of a direction perpendicular tothe substrate.
 6. The display device of claim 4, further comprising aplurality of display signal lines electrically connected to theplurality of display units, wherein the plurality of display signallines overlap with the curved portion of the insulating layer in view ofa direction perpendicular to the substrate.
 7. The display device ofclaim 4, wherein the curved portion of the insulating layer is incontact with the substrate.
 8. The display device of claim 1, whereinthe reflection reducing layer has a curved portion in a cross sectionalview, and the curved portion has a curved edge.
 9. The display device ofclaim 8, further comprising a plurality of touch units and a pluralityof touch signal lines electrically connected to the plurality of touchunits, wherein the plurality of touch signal lines overlap with thecurved portion of the reflection reducing layer in view of a directionperpendicular to the substrate.
 10. The display device of claim 9,wherein a portion of the plurality of touch units overlap with a portionof the plurality of display signal lines in view of the directionperpendicular to the substrate.
 11. The display device of claim 8,further comprising a plurality of display signal lines electricallyconnected to the plurality of display units, wherein the plurality ofdisplay signal lines overlap with the curved portion of the reflectionreducing layer in view of a direction perpendicular to the substrate.12. The display device of claim 8, wherein the curved portion of thereflection reducing layer is in contact with the substrate.
 13. Thedisplay device of claim 1, further comprising a plurality of touchunits, a plurality of touch signal lines electrically connected to theplurality of touch units, and a plurality of display signal lineselectrically connected to the plurality of display units, wherein theplurality of touch signal lines and the plurality of display signallines do not overlap with each other in view of a directionperpendicular to the substrate.
 14. The display device of claim 1,wherein the reflection reducing layer includes a plurality of recesses,and the plurality of recesses are away from the substrate.
 15. Thedisplay device of claim 14, wherein the plurality of recesses arecorresponding to the plurality of display units in a directionperpendicular to the substrate.
 16. The display device of claim 14,wherein a width of one of the plurality of recesses is greater than awidth of one of the plurality of the display units in a cross sectionalview.
 17. The display device of claim 14, wherein the reflectionreducing layer includes a plurality of protrusions, and the plurality ofrecesses and the plurality of protrusions are arranged in alternatingpositions.
 18. The display device of claim 17, wherein a thickness ofone of the plurality of recesses is less than a thickness of one of theplurality of protrusions.
 19. The display device of claim 1, wherein thereflection reducing layer covers the insulating layer.
 20. The displaydevice of claim 1, wherein the reflection reducing layer has differentthicknesses.